rec.autos.simulators

GPL Steer ratio and calib values

rob

GPL Steer ratio and calib values

by rob » Tue, 06 Oct 1998 04:00:00

There's just no way the car would be driveable if you were using
a button for throttle and every time you pushed it the throttle
went on full.

I don't think he means traction control is mandatory with a
'digital proportional' throttle, as in, a variable throttle implemented
digitally.  He's referring to an on/off button setup for throttle.

rob.



>> You could spin the rear tires and snake your way out, but that's not an
>option
> >when traction control is enabled, and traction control is mandatory when
>using a
> >digital throttle.

>Traction control mandatory w/ digital throttle??
>Is this a bad joke or is it just me - that dont get the point??

>Please explain Randy.

>All the best,
>Edwin Solheim
>REMOVE SPAM-GUARD IN ADDRESS TO REPLY!
>Check out "The Paddock - a legendary site..." for
>some cool GPL-stuff!!
>[http://www.racesimcentral.net/)

William Dahm

GPL Steer ratio and calib values

by William Dahm » Wed, 07 Oct 1998 04:00:00

1) Is it my imagination or does the steer ratio not make any
difference?  Try it yourself; set steer ratio to the max, go out to the
track and, while stopped in the pits, look at the angle of the wheels at
max lock, then set steer ratio to min and look at the wheels at max
lock.  I swear they are the same!  If I am right on this it is certainly
a major bug.

2) Does anyone know where in the program the calibration values are?  Im
talking about hex editing here.  In ICR2 there was a calib.val file in
the main directory, and in GP2 they were in the f1gstate.sav file at the
top.  I would REALLY like to know where these are in gpl so I can edit
my wheel lock to less that way.

one of these two ways I have to get my lock down, turning my wheel a
slight 10-15 deg makes a turn (way to twichy!), but I want to have to go
at least 45-60 deg as in other sims on most turns and 100-110 deg for
the hairpins

p.s. I have already played around with the sensivity slider, that is not
the answer
p.p.s. the wheel lock in the demo was small enough, if only I could get
the final to feel like that it would be good!

Thankyou for any answers u can provide!
L8er

Eric T. Busc

GPL Steer ratio and calib values

by Eric T. Busc » Wed, 07 Oct 1998 04:00:00

Remember in GPL you are controlling the steering ratio, not wheel lock.
The front wheels will always have the same maximum lock, what's actually
changing is how much steering input is needed to get there (lower
numbers will give tighter, more responsive steering).

- Eric


William Dahm

GPL Steer ratio and calib values

by William Dahm » Wed, 07 Oct 1998 04:00:00


> Remember in GPL you are controlling the steering ratio, not wheel
> lock.
> The front wheels will always have the same maximum lock, what's
> actually
> changing is how much steering input is needed to get there (lower
> numbers will give tighter, more responsive steering).

are u sure about this eric? it should do both.  Think about it - if the
steer ratio is 12:1 that means 12 deg of turn on the steering wheel is 1
deg of turn on the front wheels >>> 20:1 means 20 deg of turn on the
steering wheel is 1 deg of turn on the front wheels

so . . .

if u have 12:1 and turn the wheel 170 deg (the max lock of the "extra
arms and wheel") then the front wheels should turn 14 .166 deg (170/12)

if u have 20:1 and turn the wheel 170 deg (the max lock of the "extra
arms and wheel") then the front wheels should trun 8.5 deg (170/20)

so the max lock with 12:1 should be 14.166 deg and the max lock with
20:1 should be 8.5 deg
is this not correct?


lock anyway!!??

Randy Cassid

GPL Steer ratio and calib values

by Randy Cassid » Wed, 07 Oct 1998 04:00:00



The steering ratio while stopped is the same for all cars, regardless of
the value specified on the setup sheet (and it's much lower than you can
select in the garage).  It's impossible to get out of the pits at some
tracks with a reasonable steering ratio.  You could spin the rear tires and
snake your way out, but that's not an option when traction control is
enabled, and traction control is mandatory when using a digital throttle.

Try the same experiment with a twist.  Blast down the front straight at
Monza at speed.  Mash the brakes so that the front wheels lock up (so that
your car continues straight down the track when you perform the next step).
 Turn the wheel to either lock.  Adjust your steering ratio and try the
same thing again.  You'll find that the steering ratio setting is, indeed,
functional.

Randy

Eric T. Busc

GPL Steer ratio and calib values

by Eric T. Busc » Wed, 07 Oct 1998 04:00:00

It does do both, but for your example of being stopped in the pits the
steering ratio you've chosen is thrown out the window and you are given
a preset maximum lock (I should have mentioned that, sorry).  While at
speed however, the normal ratio/lock relationship you'd expect is
working properly.

- Eric


Marc Collin

GPL Steer ratio and calib values

by Marc Collin » Wed, 07 Oct 1998 04:00:00

Set it at a low number and then try to drive through the hairpins at
Monaco...you'll see it has a dramatic effect.

Marc.


>1) Is it my imagination or does the steer ratio not make any
>difference?  Try it yourself; set steer ratio to the max, go out to the
>track and, while stopped in the pits, look at the angle of the wheels at
>max lock, then set steer ratio to min and look at the wheels at max
>lock.  I swear they are the same!  If I am right on this it is certainly
>a major bug.

Phillip McNell

GPL Steer ratio and calib values

by Phillip McNell » Thu, 08 Oct 1998 04:00:00

My impression is that the amount of wheel turn shown on screen doesn't
necessarily relate to how much wheel turn you're actually steering.
What you see is often less than what you're driving.

Now of course the car drives according to how much you steer,
regardless of what you see. Its just that the visuals don't seem to
animate the full range of steering lock. In fact the visuals only seem
to depict about 10 or 20 degrees of lock regardless of whether you're
steering a much greater lock.

I can only speculate the reason for this is the increased animation
requirements for showing greater locks. Although you'd think that in a
sim where so many other things are taken to the maximum degree of
realism so would the visual impression of steering locks.

Bye

Phillip McNelley



Wolfgang Prei

GPL Steer ratio and calib values

by Wolfgang Prei » Thu, 08 Oct 1998 04:00:00


>The steering ratio while stopped is the same for all cars, regardless of
>the value specified on the setup sheet (and it's much lower than you can
>select in the garage).  It's impossible to get out of the pits at some
>tracks with a reasonable steering ratio.  You could spin the rear tires and
>snake your way out, but that's not an option when traction control is
>enabled, and traction control is mandatory when using a digital throttle.

Neat. I always had a problem in GP2 exiting the pits in Spa with my
favourite setup. I just couldn't make the car turn enough to get
through the La Source pit exit. Really, I like it. One more nice
detail in GPL.

--
Wolfgang Preiss   \ E-mail copies of replies to this posting are welcome.


Edwin Solhei

GPL Steer ratio and calib values

by Edwin Solhei » Thu, 08 Oct 1998 04:00:00


> You could spin the rear tires and snake your way out, but that's not an

option
 >when traction control is enabled, and traction control is mandatory when
using a
 >digital throttle.

Traction control mandatory w/ digital throttle??
Is this a bad joke or is it just me - that dont get the point??

Please explain Randy.

All the best,
Edwin Solheim
REMOVE SPAM-GUARD IN ADDRESS TO REPLY!
Check out "The Paddock - a legendary site..." for
some cool GPL-stuff!!
[http://home.c2i.net/thepaddock)

Pat Dotso

GPL Steer ratio and calib values

by Pat Dotso » Thu, 08 Oct 1998 04:00:00


> Try the same experiment with a twist.  Blast down the front straight at
> Monza at speed.  Mash the brakes so that the front wheels lock up (so that
> your car continues straight down the track when you perform the next step).
>  Turn the wheel to either lock.  Adjust your steering ratio and try the
> same thing again.  You'll find that the steering ratio setting is, indeed,
> functional.

I noticed something else about the steering.  Going into a tight
hairpin,
if you turn the wheel all the way to the stops, the front wheels don't
immediately turn completely.  If fact, as you slow down they turn more,
and if you speed up a bit, they will turn even less.  It's almost as
if GPL sees the wheel position of the sim-driver not as a true position,
but as a measure of force being applied to the virtual steering wheel.

Maybe it relates to the low-speed behaviour you mentioned that is used
in the pits, but I would like to understand it better.  Would you care
to
comment on that Randy?

--
Pat Dotson
IMPACT Motorsports
http://www.impactmotorsports.com/pd.html

Peter Gag

GPL Steer ratio and calib values

by Peter Gag » Sat, 10 Oct 1998 04:00:00




> > Try the same experiment with a twist.  Blast down the front
> > straight at
> > Monza at speed.  Mash the brakes so that the front wheels lock up
> > (so that
> > your car continues straight down the track when you perform the
> > next step).
> >  Turn the wheel to either lock.  Adjust your steering ratio and
> > try the
> > same thing again.  You'll find that the steering ratio setting
> > is, indeed,
> > functional.

> I noticed something else about the steering.  Going into a tight
> hairpin,
> if you turn the wheel all the way to the stops, the front wheels
> don't
> immediately turn completely.  If fact, as you slow down they turn
> more,
> and if you speed up a bit, they will turn even less.  It's almost
as
> if GPL sees the wheel position of the sim-driver not as a true
> position,
> but as a measure of force being applied to the virtual steering
> wheel.

> Maybe it relates to the low-speed behaviour you mentioned that is
> used
> in the pits, but I would like to understand it better.  Would you
> care
> to
> comment on that Randy?

Its called steering with the throttle.....

To check it out, drive around a long radius bend, say Monza Curva
parabolioca, try to keep the steering wheel still at the same angle,
but gradually increase or decrease the throttle, and the car will
turn in, or turn out as the throttle varies.

8-)

*Peter*    8-)
(NB: remove asterix to e-mail)

Pat Dotso

GPL Steer ratio and calib values

by Pat Dotso » Sat, 10 Oct 1998 04:00:00




> > I noticed something else about the steering.  Going into a tight
> > hairpin,
> > if you turn the wheel all the way to the stops, the front wheels
> > don't
> > immediately turn completely.  If fact, as you slow down they turn

> Its called steering with the throttle.....

> To check it out, drive around a long radius bend, say Monza Curva
> parabolioca, try to keep the steering wheel still at the same angle,
> but gradually increase or decrease the throttle, and the car will
> turn in, or turn out as the throttle varies.

I said, "tight hairpin", which implies a very slow first gear
turn where the car is barely moving.  There is one of this type
at Mexico, T5R at Rouen is another, and there are maybe a few
more at other tracks.

--
Pat Dotson
IMPACT Motorsports
http://www.impactmotorsports.com/pd.html

John Walla

GPL Steer ratio and calib values

by John Walla » Tue, 13 Oct 1998 04:00:00

On Wed, 7 Oct 1998 17:35:15 +0200, "Edwin Solheim"


>Traction control mandatory w/ digital throttle??
>Is this a bad joke or is it just me - that dont get the point??

Can you honestly imagine trying to drive when your throttle is either
off or at 100%? Try it tonight then report back with your results...

Cheers!
John

Edwin Solhei

GPL Steer ratio and calib values

by Edwin Solhei » Tue, 13 Oct 1998 04:00:00

Thank God!!
It was just me.. that didnt get the point! :)

I misinterpid the "digital throttle" part...

All the best,
Edwin Solheim
REMOVE SPAM-GUARD IN ADDRESS TO REPLY!
Check out "The Paddock - a legendary site..." for
some cool GPL-stuff!!
[http://home.c2i.net/thepaddock)


>On Wed, 7 Oct 1998 17:35:15 +0200, "Edwin Solheim"

>>Traction control mandatory w/ digital throttle??
>>Is this a bad joke or is it just me - that dont get the point??

>Can you honestly imagine trying to drive when your throttle is either
>off or at 100%? Try it tonight then report back with your results...

>Cheers!
>John


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